APPL
an effector protein of the small GTPase Rab5, a key regulator of endocytosis. Required for the regulation of cell proliferation in response to extracellular signals from an early endosomal compartment. Links Rab5 to nuclear signal transduction. Contains a PH domain and an N-terminal PID domain. Its interaction with RAB5A/Rab5 is essential for its recruitment to endosomal membranes as well as its role in cell proliferation. Binds DCC and the catalytic domain of the inactive form of AKT2 through its PID domain. Binds PIK3CA and subunits of the NuRD/MeCP1 complex. Phosphorylated upon DNA damage. Note: This description may include information from UniProtKB.